Control of concurrent access to a partitioned data file

Details Control of concurrent access to a partitioned data file Control of concurrent access to a partitioned data file

2003-05-23

2008-10-28

Mofiz, Apu (Department: 2161)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

07444349

ABSTRACT:
Method and apparatus for controlling concurrent access to a data file. The data file is organized into a plurality of partitions, and a lock file that is accessible to the client applications is persistently stored. The lock file includes lock objects that correspond to the plurality of partitions, and each lock object indicates a lock status of the corresponding partition. The client applications perform an atomic file system operation on a persistent file system object when exclusive access is sought to the lock file. Successful completion of the atomic file system operation indicates that a client application has exclusive control over the lock file, and the lock file may thereafter be updated, the atomic operation undone, and access made to a selected partition.

REFERENCES:
patent: 5717919 (1998-02-01), Kodavalla et al.
patent: 5918229 (1999-06-01), Davis et al.
patent: 5950205 (1999-09-01), Aviani, Jr.
patent: 6012085 (2000-01-01), Yohe et al.
patent: 6029190 (2000-02-01), Oliver
patent: 6041394 (2000-03-01), Halligan et al.
patent: 6714951 (2004-03-01), Bills et al.
patent: 6772206 (2004-08-01), Lowry et al.
Microsoft Computer Dictionary, Fifth Edition, 2002, p. 472.
Vivek Singhal et al.; “Texas: An Efficient, Portable Persistent Store”; Fifth International Workshop on Persistent Object Systems; San Miniato, Italy; Sep. 1992; pp. 1-19.
Charles Lamb; “The Objectstore Database System”; Oct. 1991/vol. 34, No. 10/Communications of the ACM; 50-63.
Sheetal V. Kakkad et al.; “Address Translation Strategies in the Texas Persistent Store”; 5th UNSENIX Conference on Object-Oriented Technologies and Systems (COOTS '99); 199 by the UNSENIX Association; 16 pgs.
Seth J. White et al.; “QuickStore: A High Performance Mapped Object Store”; VLDB Journal, 4 629-673 (1995); Copyright VLDB; Received Sep. 8, 1994; pp. 629-673.
James L. Peterson, et al.; “Operating System Concepts”; published by Addison-Wesley Publishing Company; Copyright 1983; pp. 319-323.

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